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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: Hathesque on March 11, 2019, 07:00:30 AM

Title: Bromide identification with chloroform
Post by: Hathesque on March 11, 2019, 07:00:30 AM

Bromide solution, HCl, chloramine-t and chloroform are mixed together. There are two separate layers and the one with chloroform is brownish(there's also a cation in the solution so the colour might be a tad off).

The question is what exactly happens during the reaction? Why does the chloroform layer change colour?

What I've come up with so far: bromide gets oxidised and there'll be bromine molecules. I assume that somehow affects the colour, maybe by bromine dissolving in chloroform?

Title: Re: Bromide identification with chloroform
Post by: AWK on March 11, 2019, 10:14:42 AM

Did you see pure bromine? If not, take a look at the English Wikipedia. There is a quite realistic photograph of a bromine sample.
Now imagine the solution diluted more than 1000 times.